Hey everyone,
This is due to go into an upcoming patch but we figured that we'd allow owners of the T300RS Wheel to use the game with GRID Autosport right now.
If you have a T300RS simply follow these simple instructions:
1) Download this file: http://blog.codemasters.com/wp-content/uploads/2014/09/GRIDAutosport_T300RS.zip
2) Extract the 'forcefeedback' files and the 'input' files to the corresponding folders in your GRID Autosport steam directory.
3) Play the game
Note: the steam install directory is typically found here -
C:\Program Files (x86)\Steam\SteamApps\common\GRID Autosport\